CN112136730A - Method for breeding river snails and spotted silver carps by intercropping rice shrimps - Google Patents
Method for breeding river snails and spotted silver carps by intercropping rice shrimps Download PDFInfo
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- CN112136730A CN112136730A CN202011222733.1A CN202011222733A CN112136730A CN 112136730 A CN112136730 A CN 112136730A CN 202011222733 A CN202011222733 A CN 202011222733A CN 112136730 A CN112136730 A CN 112136730A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/51—Culture of aquatic animals of shellfish of gastropods, e.g. abalones or turban snails
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The invention provides a method for breeding river snails and spotted silver carps by intercropping rice and shrimps, and belongs to the technical field of aquaculture. The method for breeding the rice shrimp intercropping river snail and the spotted silver carp provided by the invention is characterized in that rice, shrimp, spotted silver carp and river snail are jointly bred. The crayfish is fed by the feed, the excrement of the crayfish and the spotted silver carp is absorbed and utilized by the river snail, and the excrement generated by the river snail is utilized by the rice; the spotted silver carps eat the phytoplankton in the rice field, so that the water quality is purified, the ecological balance of the water body is maintained, a good growing environment is provided for the crayfishes and the river snails, the water body diseases are reduced, the yield of the crayfishes, the river snails and the rice is increased, and the economic benefit is improved. The method for breeding the rice shrimps and the river snails and the spotted silver carps in a mixed mode is a healthy and efficient breeding method.
Description
Technical Field
The invention belongs to the technical field of aquaculture, and particularly relates to a method for breeding river snails and spotted silver carps by intercropping rice shrimps.
Background
The rice and shrimp symbiotic mode is to cultivate shrimps in a planted rice field, so that the water environment of the rice field is fully utilized, and the better yield of rice and shrimps can be obtained from the current rice and shrimp symbiotic cultivation condition. However, the current rice and shrimp culture only focuses on the yield of shrimps, neglects the conditions of rice and water, seriously deteriorates water quality, breeds a large amount of pathogenic microorganisms in the water, and has high morbidity of the crayfish; after the crayfishes die, the water is changed in the conventional method, so that a large amount of water resources are wasted, and the current rice and shrimp culture mode has higher risk. Therefore, the existing rice and shrimp breeding mode needs to be improved urgently, and an ecological breeding method with high economic benefit and low risk is provided.
Disclosure of Invention
In order to solve the problems, the invention provides a method for breeding river snails and spotted silver carps by intercropping rice shrimps. The method for breeding the rice shrimps, the river snails and the spotted silver carps in the mixed mode improves the economic benefit of breeding, can maintain the ecological balance of the water body, solves the problem that the morbidity of the traditional rice shrimp breeding crayfishes is high due to water quality deterioration and pathogenic microorganism breeding, and is a healthy and efficient breeding method which is worth of popularization.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for culturing river snail and spotted silver carp by intercropping rice shrimp and river snail comprises the step of carrying out combined culture on rice, shrimp, spotted silver carp and river snail.
Preferably, the method for combined culture comprises the following steps: planting rice; stocking crayfishes; breeding and harvesting river snails and spotted silver carps;
the rice planting, crayfish stocking, river snail stocking and spotted silver carp stocking are carried out in the same year, and the harvesting is as follows: harvesting rice and river snail in the current year, and harvesting crayfish and spotted silver carp in the next year.
Preferably, the rice is grown for 7 months per year.
Preferably, the rice field is disinfected by quicklime before the rice is planted, and the usage amount of the quicklime is 50-100 kg/mu.
Preferably, the feeding time of the crayfishes is 8-9 months, the feeding specification of the crayfishes is 20-30 g/crayfish, and the feeding amount of the crayfishes is 25-30 kg/mu.
Preferably, the feed is fed in the crayfish breeding process, the feeding amount of the feed is 2% -6% of the weight of the crayfish, and the feeding frequency of the feed is 2-3 d.
Preferably, the putting time of the river snail and the spotted silver carp is 5-7 days after the rice is planted.
Preferably, the feeding specification of the river snails is 2-5 g/snail, and the feeding specification of the spotted silver carps is 80-150 g/tail; the putting amount of the river snails is 40-60 kg/mu, and the putting amount of the spotted silver carps is 1.6-3 kg/mu; the river snail and the spotted silver carp do not need to be fed during the culture period.
Preferably, the harvesting time of the rice is 10-11 months in the year; the harvesting time of the crayfishes is 3-6 months of the next year, the harvested specification is more than 80g, and the crayfishes below the harvesting specification are placed in a pond for breeding; the harvesting time of the spotted silver carps is 3-6 months in the next year, and the harvesting specification of the spotted silver carps is 250-500 g/tail; putting the spotted silver carps with the harvesting specifications below into a pond for culturing; the method is characterized in that the river snail harvesting time is before rice harvesting, the river snail harvesting specification is 8-10 g/river snail, and the river snails below the harvesting specification are cultured in a pond.
Preferably, the pH value of the rice field water for the combined cultivation is 7-8, the temperature of the rice field water is 20-30 ℃, and the rice field water keeps a micro-flowing state.
Has the advantages that:
the invention provides a method for breeding river snails and spotted silver carps by intercropping rice shrimps. The method for breeding the river snail and the spotted silver carp in the intercropping of the rice shrimp, disclosed by the invention, comprises the steps of feeding the crayfish by the feed, absorbing and utilizing the excrement of the crayfish and the spotted silver carp by the river snail, and utilizing the excrement generated by the river snail by the rice; the spotted silver carps eat the phytoplankton in the rice field, so that the water quality is purified, the ecological balance of the water body is maintained, a good growing environment is provided for the crayfishes and the river snails, the water body diseases are reduced, the yield of the crayfishes, the river snails and the rice is increased, and the economic benefit is improved. The method for breeding the rice shrimps and the river snails and the spotted silver carps in a mixed mode is a healthy and efficient breeding method. The results of the embodiment show that by using the cultivation method disclosed by the invention, the yield of rice is increased by 20-40 kg/mu, the yield of crayfish is increased by 5-20 kg/mu, the yield of spotted silver carp is 6-10 kg/mu, the yield of field snails is 160-240 kg/mu, and the net profit per mu reaches 4118.3-4566.7 yuan.
Detailed Description
The invention provides a method for breeding river snails and spotted silver carps by intercropping rice shrimps. According to the method for breeding the river snails and the spotted silver carps by intercropping the rice shrimps, the crayfishes are fed by the feed, the excrement of the crayfishes and the spotted silver carps is absorbed and utilized by the river snails, and the excrement generated by the river snails is utilized by the rice; the spotted silver carps eat the phytoplankton in the rice field, so that the water quality is purified, the ecological balance of the water body is maintained, a good growing environment is provided for the crayfishes and the river snails, the water body diseases are reduced, the yield of the crayfishes, the river snails and the rice is increased, and the economic benefit is improved. The method for breeding the rice shrimps and the river snails and the spotted silver carps in a mixed mode is a healthy and efficient breeding method.
The method for combined culture preferably comprises the following steps: planting rice; stocking crayfishes; breeding and harvesting river snails and spotted silver carps;
the rice planting, crayfish stocking, river snail stocking and spotted silver carp stocking are carried out in the same year, and the harvesting is as follows: harvesting rice and river snail in the current year, and harvesting crayfish and spotted silver carp in the next year.
The invention carries out rice planting. In the present invention, the time for planting the rice is preferably 7 months per year. The invention has no special requirements on the variety of the rice, and can be used by the conventional high-yield variety in the field. The present invention preferably sterilizes the rice field with quicklime before rice is planted. In the invention, the time for disinfection is preferably 7-10 days before rice planting, and more preferably 8 days before rice planting. In the invention, the usage amount of the quicklime is preferably 50-100 kg/mu, and more preferably 60 kg/mu. The method has no special requirements on the planting method of the rice and the seedling management of the rice, and can be realized by adopting a method well known by the technical personnel in the field.
The crayfish breeding method is used for breeding crayfish. The feeding time of the crayfish is preferably 8-9 months, and more preferably 8 months; the feeding specification of the crayfishes is preferably 20-30 g/crayfish, and is further preferably 30 g/crayfish; the feeding amount of the crayfishes is preferably 25-35 kg/mu, and more preferably 30 kg/mu. The crayfish feeding density is moderate, the morbidity is low, and the highest economic benefit is achieved. The invention preferably feeds the crayfish during the breeding process, and the feed is preferably special feed for the crayfish. In the invention, the feeding amount of the feed is preferably 2-6% of the weight of the crayfish, and is further preferably 3% of the weight of the crayfish, so that the growth requirement of the crayfish can be guaranteed, and the feed is not wasted; in the invention, the feeding frequency of the feed is preferably once every 2-3 d, and is further preferably once every 3d, so that the feeding requirement of the crayfish is met, and the crayfish can be fed regularly. According to the invention, the crayfish does not need to be fed with animal feed, and the crayfish can prey on the field river snail to be used as the animal feed, so that the yield of the crayfish is improved.
The invention is used for breeding river snails and spotted silver carps. In the invention, the throwing time of the river snail and the spotted silver carp is preferably 5-7 d after the rice is planted, and more preferably 7 d. In the invention, the preferable feeding specification of the river snails is 2-5 g/snail, and the more preferable specification is 3 g/snail; the preferable putting amount of the river snails is 40-60 kg/mu, and the more preferable putting amount is 50 kg/mu. In the invention, the preferable putting specification of the spotted silver carp is 80-150 g/strip, and the further preferable putting specification is 100 g/strip; the putting amount of the spotted silver carps is 1.6-3 kg/mu, and the preferable range is 2 kg/mu. According to the invention, by reasonably controlling the feeding amount of the spotted silver carps and the river snails, the growth of the crayfishes is not inhibited, the requirement of the river snails for utilizing the excrement of the crayfishes can be met, and meanwhile, the spotted silver carps can also purify the water well without influencing the growth of the river snails and the crayfishes. The river snail and spotted silver carp do not need to be fed during the culture period. The invention has no special requirements on the types of the river snails and the spotted silver carps, and can be prepared by adopting common market types. River snail is mollusk, mainly eats young stem and leaf of aquatic plant, organic debris, etc., and can be eaten by feces and organic debris of shrimp and silver carp; silver carps are typical filter-feeding fishes, mainly feed phytoplankton, and meanwhile, excrement discharged by the silver carps contains rich protein, organic matters, cellulose, vitamins and the like, so that the silver carps are superior feeds for field snails. The river snail and the spotted silver carp can well purify water quality, maintain water body balance and reduce water body diseases; the river snail is used as the animal feed of the crayfish, so that the yield of the crayfish is further improved; the feces of the river snail, the spotted silver carp and the crayfish also provide rich organic nutrient substances for the rice, so that the yield of the rice is further improved; meanwhile, the river snail and the spotted silver carp can be sold, so that the economic added value of the rice shrimp culture is increased.
The invention is used for harvesting. In the invention, the harvesting time of the rice is preferably 10-11 months of the year, and more preferably 10 months; the harvesting time of the crayfishes is preferably 3-6 months of the next year, and is further preferably 5 months; the harvesting specification of the crayfishes is preferably more than 80g, and the crayfishes below the harvesting specification are preferably put into a pond for cultivation. In the invention, the harvesting time of the spotted silver carps is preferably 3-6 months in the next year, and more preferably 5 months; the harvesting specification of the spotted silver carps is preferably 350 g/tail; the spotted silver carps with the harvesting specifications below are preferably cultured in a pond. In the invention, the time for harvesting the escargots is preferably before harvesting rice, the harvesting specification of the escargots is preferably 8-10 g/escargots, more preferably 9 g/escargots, and the escargots below the harvesting specification are preferably cultured in a pond. The invention determines the harvesting time according to the growth conditions and market prices of crayfish, river snail and spotted silver carp, thereby maximizing the obtained economic benefit.
In the present invention, the rice planting, crayfish stocking, escargots and spotted silver carp stocking are preferably performed in the same year.
In the invention, the pH value of the water for the combined culture is preferably 7-8, and further preferably 7.5; the temperature of the water is preferably 20-30 ℃, and is further preferably 25 ℃; the water is preferably maintained in a micro-flow state, preferably by means of a water inlet and a water outlet. The water environment provided by the invention is the optimal environment for the growth and propagation of crayfish, and the yield of crayfish can be improved; in addition, the water body is kept in a microflow state, so that the water body can keep a certain self-purification effect on organic or inorganic pollutants, the eutrophication of the water body is prevented, the water body diseases are reduced, and the production benefit is improved.
To further illustrate the present invention, the method for cultivating river snail and spotted silver carp by intercropping rice shrimp according to the present invention will be described in detail with reference to the following examples, which should not be construed as a prerequisite for the protection scope of the present invention.
Example 1
A place: hubei Xingcheng shrimp and rice cooperative professional society;
time: 2019
Area: 600 mu
Pond snail and spotted silver carp intercropped with rice and shrimp
(1) Planting rice: planting rice in No. 7/month and No. 10, and sterilizing the rice field with quicklime before planting, wherein the usage amount of the quicklime is 5 kg/mu; the rice variety is national check rice, and the seeding quantity of the rice is 4.5 ten thousand plants/mu; when the rice grows to 3 leaves, the soil is kept moist, and the rice is not white, does not crack and is not irrigated. The paddy rice is suitable for draining water and exposing the field when the rice is subjected to seedling stiffness and root poisoning (black root). And (5) draining water to expose the field when the field flooding period exceeds 5 days. And water is discontinuously poured in the booting stage, the heading and flowering stage and the grouting stage to keep the soil moist. In the tillering stage, thin water irrigation is combined with field exposure, and drainage field exposure is required when the planned seedling number is reached. For a field with tender green rice seedlings and tillering growth vigor, the field can be exposed to the environment and cracked by about 1 cm, the middle of the field is not sunk enough, and the leaf color is faded when the field is exposed to heavy weight. Fertilizing water once a month, wherein the fertilizing amount is 45 kg/mu.
(2) Stocking crayfishes: feeding crayfish in 8 months and 7 days, wherein the feeding specification is 25g, and the feeding amount is 30 kg/mu; feeding the special feed for the crayfishes in the crayfish breeding process, wherein the feeding amount of the feed is 3% of the weight of the crayfishes, and the feeding frequency of the feed is 2-3 days. During the culture period, the pH value of water is kept at 7-8 for quality inspection, the water temperature is kept at 20-30 ℃, and the water is kept in a microflow state.
(3) Throwing river snails and spotted silver carps: after the rice is planted for 7 days, the river snails are thrown into the rice field according to 50 kg/mu, and the spotted silver carps are thrown according to 2 kg/mu; the feed specification of river snails is 2-5 g/river snails, and the feed specification of spotted silver carps is 80-150 g/tail; the river snail and the spotted silver carp are not required to be fed during the culture period, and the river snail takes the excrement of the shrimps and the spotted silver carp and organic scraps of pond feed as food; the silver carp takes phytoplankton in water as food.
(4) Harvesting: the crayfish is harvested in 3 months and harvested in 6 months, the harvesting specification is above 80g, the crayfish is sold, and the crayfish below 80g is placed in a pond for cultivation. The method comprises the following steps of (1) harvesting the spotted silver carps for 3-6 months, wherein the harvesting specification of the spotted silver carps is 250-500/tail; collecting the spotted silver carps below the specification and continuously culturing; collecting escargots for 5 months and 26 days, wherein the collection specification is more than 8g, water in a rice field is drained until the water is exposed out of the bottom of the field, and the escargots with qualified weight are fished for sale; the harvesting time of the rice is 10 months and 5 days, and the rice is harvested after being dried in the air and at the bottom of the field before being harvested. And (4) yield: the per mu yield of the crayfishes is 127.8 kg/mu, the average selling price is 43 yuan/kg, and the hair income is 147.7 ten thousand yuan; the yield of the spotted silver carps is 8.2 kg/mu, the average selling price is 12 yuan/kg, and the hair income is 6.2 ten thousand yuan; the acre yield of the field snails is 210 kg/acre, the average selling price is 2 yuan/kg, and the income of the field snails is 20.9 ten thousand yuan; the yield per mu of the rice is 358kg, the average selling price is 3.1 yuan/kg, and the income of the rice is 72.3 ten thousand yuan; the gross income is 247.1 ten thousand yuan in total, and the gross income per mu is 4118.3 yuan/mu.
Example 2
The same cultivation method as in example 1, except that: the time is 2018; the feeding time of the crayfishes is 2018 and 8 months, the feeding specification of the crayfishes is 30g, the feeding amount of the crayfishes is 30 kg/mu, and the feeding of the feed is carried out according to 3% of the weight of the crayfishes; the putting time of the river snail and the spotted silver carp is 7 days after the rice is planted; the feeding specification of the river snails is 2-5 g/river snails, and the feeding specification of the spotted silver carps is 80-120 g/river snails; the dosage of the river snail is 50 kg/mu, and the dosage of the spotted silver carp is 2 kg/mu.
And (4) yield: the per mu yield of the crayfish is 128.7kg, the average selling price is 44 yuan/kg, and the hair income is 176.4 ten thousand yuan; the yield of the spotted silver carps is 9.2kg per mu, the average selling price is 11 yuan/kg, and the hair income is 5.3 ten thousand yuan; the yield of the field snails per mu is 194kg, the average selling price is 2 yuan/kg, and the income of the field snails is 20.8 ten thousand yuan; the yield per mu of the rice is 574kg, the average selling price is 3 yuan/kg, and the income of the wool is 71.5 ten thousand yuan; the gross income is 274 ten thousand yuan in total, and the gross income per mu is 4566.7 yuan/mu.
Example 3
The same cultivation method as in example 1, except that: the time is 2017; the feeding time of the crayfishes is 8 months, the feeding specification of the crayfishes is 25-30 g/crayfish, the feeding amount of the crayfishes is 30 kg/mu, and the feeding of the feed is carried out according to 3% of the weight of the crayfishes; the putting time of the river snail and the spotted silver carp is 7 days after the rice is planted; the feeding specification of the river snails is 2-6 g, and the feeding specification of the spotted silver carps is 80-150 g; the dosage of the river snail is 60 kg/mu, and the dosage of the spotted silver carp is 2 kg/mu.
And (4) yield: the per mu yield of the crayfish is 126.7kg, the average selling price is 43 yuan/kg, and the hair income is 154.4 ten thousand yuan; the yield of the spotted silver carps is 9.2kg per mu, the average selling price is 12 yuan/kg, and the hair income is 6.2 ten thousand yuan; the acre yield of the escargots is 200kg, the average selling price is 2 yuan/kg, and the gross income is 22 ten thousand yuan; the yield per mu of the rice is 583kg, the average selling price is 3.1/kg, and the income of the hair is 74.8 ten thousand yuan; the total income of the wool is 257.4 ten thousand yuan, and the income per mu of the wool is 4290 yuan/mu.
Comparative example 1
A place: hubei Longxia aquatic products science and technology Limited
Time: 2018 years old
Area: 1000 mu
Cultivating spotted silver carps with rice and shrimps: the cultivation method is the same as that of example 1, except that escargots are not thrown.
And (4) yield: the per mu yield of the crayfish is 122.5kg, the average selling price is 44 yuan/kg, and the hair income is 330 ten thousand yuan; the yield of the spotted silver carps is 6.3kg per mu, the average selling price is 12 yuan/kg, and the hair income is 11 ten thousand yuan; the yield per mu of the rice is 105kg, the average selling price is 3.1 yuan/kg, and the income is 46 ten thousand yuan; the total wool income is 387 ten thousand yuan, and the wool income per mu is 3870 yuan/mu. When the field snails are not raised in a sleeving manner, the water quality change during the raising period is large, the morbidity of the crayfishes is high, and the raising risk is large.
Comparative example 2
A place: xiangyang of Hubei province
Time: 2016 (year)
Area: 20 mu m
Intercropping of rice and shrimp with loaches, finless eels and river snails: the breeding method is the same as that in example 1, except that the spotted silver carps are replaced by loaches and finless eels, wherein the feeding amount of the crayfishes is 200 kg/mu, the feeding amount of the loaches is 12.5 kg/mu, the feeding amount of the finless eels is 2.5 kg/mu, and the feeding amount of the field snails is 75 kg/mu; the loach feeding specification is 3-5 g/loach, and the finless eel feeding specification is 20-30 g/loach. And putting the loaches and the finless eels in the crayfishes for 7 days. The harvesting time of the finless eels and the loaches is 10-11 months.
And (4) yield: investment on 7 ten thousand yuan of crayfish seeds, 3 thousand of loaches, finless eels, feed for river snails and the like, 1.5 thousand of manpower, 7 thousand of expenses spent on digging two places in a pond, 2.3 thousand of netting gear, living expenses, oil and the like, and 14.5 ten thousand yuan in total. Approximately 2.5 ten thousand yuan for selling shrimps, trash fish and the like in 2013, 12 thousand yuan for losing in 2013, and 10 ten thousand yuan for preliminarily estimating the loss of a small part of shrimps, loaches, finless eels and the like stored in a pond. The water quality is poor because the crayfish breeding density is too high and the purification effect on the water body is not relevant. The crayfish is extremely unhealthy in growth due to the pollution of water quality, and the crayfish is bred by the overlarge culture density, so that germs in the water quality breed and a large amount of crayfish die. Compared with the embodiment of the invention, the spotted silver carp is replaced by loach and finless eel, the feeding density of the crayfish is too high, the water quality cannot be purified, the water body bacteria breed, the crayfish is sick, a large amount of death occurs, and only a small part of crayfish, loach and finless eel are left during fishing. Therefore, the loss occurs in the case, and the loss amount is about 10 ten thousand.
Comparative example 3
A place: ecological agriculture technology of Ginkgo Zhebei Sanfu, Huanggang, Macheng, Huanggan
Time: 2018 years old
Area: 700 mu
And (3) breeding rice and shrimps: the cultivation process was the same as that of example 1, except that only rice and crayfish were cultivated, wherein the amount of crayfish was 35 kg/acre.
And (4) yield: the per mu yield of the crayfish is 102kg, the average selling price is 44 yuan/kg, and the hair income is 99.5 ten thousand yuan; the yield of rice per mu is 550kg, the average selling price is 3.1 yuan/kg, and the income of wool is 47.5 ten thousand yuan; the gross income is 147 ten thousand yuan in total, and the gross income per mu is 2100 yuan/mu. Compared with the embodiment of the invention, the cultivation of the river snails and the spotted silver carps is not carried out in the embodiment, the traditional rice shrimp cultivation is adopted, during the cultivation, the crayfishes and the rice grow normally, but during the collection, the specification and the number of the crayfishes are smaller than those of the crayfishes, and the final benefit is less. Therefore, compared with the traditional rice shrimp culture, the invention can lead the crayfish to grow better and healthier, and the final benefit is higher.
From the results of the above embodiments, the method for breeding the rice shrimps and the river snail and the spotted silver carp together improves the yield of the rice and the crayfish, increases the economic benefit of breeding the rice shrimps, maintains the ecological balance of the water body, solves the problem of high morbidity of the crayfish bred by the traditional rice shrimp due to water quality deterioration and pathogenic microorganism breeding, and is a healthy and efficient breeding method which is worth of popularization.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (10)
1. A method for breeding river snails and spotted silver carps by intercropping rice shrimps comprises the following steps: the rice, the shrimp, the spotted silver carp and the river snail are jointly cultivated.
2. The cultivation method as claimed in claim 1, wherein the method of combined cultivation comprises the following steps: planting rice; stocking crayfishes; breeding and harvesting river snails and spotted silver carps;
the rice planting, crayfish stocking, river snail stocking and spotted silver carp stocking are carried out in the same year, and the harvesting is as follows: harvesting rice and river snail in the current year, and harvesting crayfish and spotted silver carp in the next year.
3. The farming method of claim 2, wherein the time of rice planting is the 7 months per year.
4. The cultivation method according to claim 2 or 3, wherein quicklime is used for sterilizing the rice field before planting, and the usage amount of the quicklime is 50-100 kg/mu.
5. The cultivation method as claimed in claim 2, wherein the feeding time of the crayfishes is 8-9 months, the feeding specification of the crayfishes is 20-30 g/crayfish, and the feeding amount of the crayfishes is 25-35 kg/mu.
6. The cultivation method as claimed in claim 4, wherein the feed is fed during the cultivation of the crayfish, the feeding amount of the feed is 2-6% of the weight of the crayfish, and the feeding frequency of the feed is 2-3 days.
7. The cultivation method according to claim 2, wherein the throwing time of the river snail and the spotted silver carp is 5-7 days after the rice is planted.
8. The culture method according to claim 6, wherein the river snail is fed in a dosage of 2-5 g/river snail and the spotted silver carp is fed in a dosage of 80-150 g/tail; the putting amount of the river snails is 40-60 kg/mu, and the putting amount of the spotted silver carps is 1.6-3 kg/mu; the river snail and the spotted silver carp do not need to be fed during the culture period.
9. The cultivation method according to claim 2, wherein the harvesting time of the rice is 10-11 months in the year; the harvesting time of the crayfishes is 3-6 months of the next year, the harvested specification is more than 80g, and the crayfishes below the harvesting specification are placed in a pond for breeding; the harvesting time of the spotted silver carps is 3-6 months in the next year, and the harvesting specification of the spotted silver carps is 500 g/tail of 250-; putting the spotted silver carps with the harvesting specifications below into a pond for culturing; the method is characterized in that the river snail harvesting time is before rice harvesting, the river snail harvesting specification is 10-20 g/river snail, and the river snails below the harvesting specification are cultured in a pond.
10. The cultivation method according to claim 2, wherein the pH of the paddy field water for the combined cultivation is 7 to 8, the temperature of the paddy field water is 20 to 30 ℃, and the paddy field water is kept in a micro-flow state.
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